Not at all! I bought a 1st Land Pattern "Transitional" Bess with bayonet from Loyalist Arms last year, and the service and quality are excellent for an "Indian" firelock. Loyalist Arms ships the product in two pieces to get around those dumb importation laws...the stock and barrel come in one package, and the firelock in another, and you put them together (which you have to do anyway every time you clean the piece). Shipping was easy, and there were no issues. Took about five days from the time my Bess left Halifax until it arrived at my home in Pennsylvania.
Loyalist Arms owner Blair Higgins is a really good guy, and stands behind his products. He doesn't proof the muskets though since the laws vary so much from country to country, but provides instructions for doing so. It's optional, but here is a video showing the "tire" method"
Barrel proofing a replica of an early 1700 Sea Musket from Loyalist Arms.
Be advised that Loyalist Arms has a big backlog on orders, and it could take 6 to 8 months to receive your musket after ordering. But it's worth the wait in my opinion.